Friction spring unit for draft-riggings.



J. F. OCONNOR.

FRICTION SPRLNG- UNIT FOR DRAFT RIGGINGS.

APPLICATION FILED OCT. [8. 1915.

Patented May15 1917.

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J. F. OCUNNOR.

FRICTION SPRING UNIT FOR DRAFT RIGGING'S.

APPLICATION FlLED MIT. 18, 1915- 1,226,244: Patented May15,1917.

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v INVENTOR. WITNLSS L/b/UzF mar 1 Q TTORNEY- 0 hom it may concern: i

Be it known that I, JOHN F. OCounon, a

citizen of vthe United States,'residing' at Chicagm-in the county ofOook and .2 Illinois, have invented a certain new and useful Improvementin Friction Spring Units for Draft-Riggings, ofwhich the -following is.a full, clear, concise, and ekact'description, reference being had tothe accompanyingdrawings, forming a part of this specification.

This invention relates to improvements in friction spring units fordraft riggings.

An object of the invention is to provide a 1' unit for railway draftriggings which particularly adapted to replace the ()l(l11 1211yspringsnow used in tandem gears to thereby obtain a higher capacity."

- Another ObJBCl) of the invention 1's to pro- ".E vide a shockabsorbing member wherein are employed a plurality of plate Springs whichare confined between and supported by followers, the followers andsprings having as sociated therewith friction means arranged to flex theplate springs against portions of the followers 0 In the drawing forminga part ofthis specification, Figure 1 longitudinal, verticalsectioualview of draft rigging showing it my Improvements in connectiontherewith;

Fig. 2 is a horizontal sectional v1ew-taken substantially on the line 22of F g. 1. Fig.

3 is a vertical, transverse sectional view taken substantially on thellne 33 of Fig.

1. Figs. '4', 5 and 6 are detailperspective views of a follower, shoeand wedge, respectively, employed in my invention.

Insaid drawing, 10-l0 denote draft sills to which are attached stopmembers 11-11 ha ring the usual front.

1 eachpocket ofthe tandem yoke is are employed, all

y and rear end stops, front and rear intermediate stops and limitinnstops for a tandem gear. The draw-bar 12 has connected therewith a yoke13 of the usual tandem gear typ and mounted within my im- The fol- I l-14 and transversely extending tie plates desired construction. Each ofthe improved units, which I have designated consists oftwo followers 16and 17, each hayingion its inner face-an inwardly ex tending, hollow,box-like projection 18, the

s'rarns r State of the followerslfi of any well known or generally bythe reference A,

walls parallel to the Jana r. OCONNOR, or CHICAGO, ILLINOIS, ASSIGNOR T0WILLIAM H. MINER, or y T CHAZY, NEW YORK. y I

-' riarorron'srnme UNIT roe DnArr-R'IGGINGs.

Specification of Letters Patent. I Patented May 15, 191?.

i l I Application filed'October 18,- 1915 Serial'No. 56,426.

side-walls 19ofwhicharestraight and the upper and lower interior walls20-20 thereof are concaved. Mounted between the in Figs. 1 and 3. Attheir ends, the shoes I 22 are provided with beveled or wedge faces 25with which cooperate wedges 26-26 detachably carried by the followers 16and 17, the wedges 26 being held in pro er position preferably means ofstuds 2? which engage in suitable holes 28 in the followers.

Inoperation, upon relative approach of and 17-of each unit, theapproaching movement of the wedges 26 will force the shoes 22 apart inan up and down direction. glhereupon, the sets of spring plates 21 wilbe flexed in planes perpendicular to the axis of the gear, theupper setof.

spring plates being convexed upwardly'between the upper surfaces 20 ofthe followers and surface 23 of the u'ppershoe 22, and the lower set ofspring" plates 21 will be' flexed downwardly between the convex surface23 of the lower shoe and lower surfaces20 of the followers.

are held in proper assembled position by any suitable means such as therivets 29, andthe shoes 22-and. upper and lower surfaces 20 -20 of thefollowers are suitably recessed to accommodate the ends of the rivets.

From the preceding description, it will be I seen thatl have provided aunit, which combines within itself spring and friction acting elementscompactly arranged, and the ca,- pacity ofjeach unit may be maderelatively great on account of the number of spring? plates which may beemployed. Iclaim: i 1. A shock absorbing device for draft' righavinghollow extensions on their inner op=- posits faces, said extensionshavin the inner curved, sets of plate springs interposed beaxis of t edevice 90- I The spring plates of each set gings which comprises, a pairof followers".

tween said followers and mounted within said recesses, and meansforflexing said sets of plate springs transversely against said curvedwalls upon relative approach of the followers;

ir-shockabsorbing device'for draft riggings which comprises, a pair offollowers having hollow extensions on their inner opposite faces, saidextensions having curved inner walls, of plate springs interposedbetween said followers and mounted within said recesses, and means forflexing said sets pf plate springs against saidcurved walls uponrelative approach of the followers, said means including wedgescarriedby the followers and friction shoes'cooperating therewith."

3. Ina'device of the character described, the combination with a pairrelatively movable "followers, each of'said followers having a recess onits inner face, opposite nall v between said followers and supportedthereby, said plate springs normally bearing against said curvedsurfaces, and wedges carried by the inner faces of said followers andadapted to enter between said sets pf sprin s, whereby, upon relativeapproach of--- said tollowers, the plate springs are flexed in adirection transverse to the line of moveinent of said followers againstsaid curved faces. 7

In witness that I claim the foregoing I have hereunto subscribed my namethis 29th day of Sept.,'19l5.' I I JOHN F. OCONNOR.

